21260440

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7933}}^1$

素因数の和:8011

約数の個数: 32

約数和(自身を含む): 48556080

約数和(自身を除く): 27295640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7933, 15866, 31732, 39665, 63464, 79330, 158660, 317320, 531511, 1063022, 2126044, 2657555, 4252088, 5315110, 10630220, 21260440]

約数ペア:

[(1, 21260440), (2, 10630220), (4, 5315110), (5, 4252088), (8, 2657555), (10, 2126044), (20, 1063022), (40, 531511), (67, 317320), (134, 158660), (268, 79330), (335, 63464), (536, 39665), (670, 31732), (1340, 15866), (2680, 7933)]